Stable fit shadows

I've noticed that when using the stable fit shadow projection, shadows start fading out the further they are from the center of the camera, making stable fit unusable in several cases. Now the documentation mentions nothing of this:

Can someone explain why does it happen? Is it something inherent to the technique or a bug?

Too lazy to create screenshots, so here's someone's unanswered unity answers post from a year ago with pictures:
http://answers.unity3d.com/questions/923354/shadow-projection-issue.html

 

Pinging @Aras for insight about shadows.

 

So is there any way to have stable fit shadows working on the edges of the screen? None of the quality settings seems to have any effect, doesn't matter if cascades are enabled or not. Can the circle size be increased or something?

 

The cascade splits and shadow distance should control that.

 

Like I said, nothing in the quality setting has any effect. No cascades, 2 or 4 cascades, shadow distance from 10 to 300, doesn't matter. Using orthographic camera with size 10 in this case.

 

Stable Fit shadows depend on the camera's projection depth information to work their magic. Orthographic Perspectives do not have a valid concept of depth, which is why Stable Fit shadows behave erratically when paired with Orthographic Cameras. The appropriate fix in this case is to disable stable fit. The problem stable fit shadows are meant to fix doesn't occur in a typical orthographic gameplay situation anyway (eg, rotations of a scene, changes in depth).

I would also suggest turning off cascades (set to 1), since those also depend on camera depth information that orthographic projections lack.

 

Working with perspective camera here.
Expanding further the Clipping Plane works, but in our case that would be a performance problem.
Turning off cascades doesn't do the trick.
Any other ideas?

 

@Aras any news on this after 7 years

 

any news on this after 13 years